Granted Patent
Utility
US 5,297,940 · App. 07/997,441
Sealless pump corrosion detector
Inventor:
Frederic W. Buse
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Dec 28, 1992
Inventor
Frederic W. Buse
Assignee (at issue)
Ingersoll-Dresser Pump Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.